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Urethane reaction kinetics of butanediols catalyzed by Zr(acac)4

Authors

  • Peng Fei Yang,

    Corresponding author
    1. Shandong Provincial Key Laboratory of Fine Chemicals, Shandong Polytechnic University, Jinan 250353, People's Republic of China
    • Shandong Provincial Key Laboratory of Fine Chemicals, Shandong Polytechnic University, Jinan 250353, People's Republic of China
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  • Tian Duo Li

    1. Shandong Provincial Key Laboratory of Fine Chemicals, Shandong Polytechnic University, Jinan 250353, People's Republic of China
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Abstract

The urethane reaction of isocyanate was carried out with zirconium acetyl acetonate (Zr(acac)4) as catalyst. 1,2-Butanediol and 1,4-butanediol were used as model compounds to investigate the reaction kinetics. It was shown that hydroxyl groups in 1,2-butanediol appeared to have different reaction rate when reacting with phenyl isocyanate, which was labeled as kfast and kslow. It was very surprising that the reaction rate of 1,4-butanediol (kcon) was very similar to the value of kslow at the same temperature although there is only primary hydroxyl group in its molecule. Furthermore, activation energy (Ea), activation enthalpy (ΔH), and activation entropy (ΔS) for the reaction were calculated out, from which some catalytic properties of Zr(acac)4 were revealed. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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